infection and response - Plant Disease

Question 1

Plant defences include: t____ cell walls, w____ c______ on leaves, a____________ chemicals, p______ to deter herbivores, leafs which d____, m______ and t_____ and h____.

Answer 1

Plant defences include: thick cell walls, waxy cuticle on leaves, antibacterial chemicals, poisons to deter herbivores, leafs which droop, mimicry and thorns and hairs.

Question 2

Plant diseases can be detected by: s______ growth, s____ or discolouration, d____, g_____ or m________ stems and the presence of p____.

Answer 2

Plant diseases can be detected by: stunted growth, spots or discolouration, decay, growth or malformed stems and the presence of pests.

Question 3

A lack of _______ ions can lead to stunted growth in plants.

Answer 3

A lack of nitrate ions can lead to stunted growth in plants.

Question 4

A lack of _________ ions causes a lack of chlorophyll in plants.

Answer 4

A lack of magnesium ions causes a lack of chlorophyll in plants.

Question 5

Physical plant defence responses – c________ cell walls, tough w___ c______, layers of
d___ c____ (bark).

Answer 5

Physical plant defence responses – cellulose cell walls, tough waxy cuticle, layers of
dead cells (bark).

Question 6

_________ plant defence responses – antibacterial chemicals, poisons

Answer 6

Chemical plant defence responses – antibacterial chemicals, poisons

Question 7

Mechanical adaptations – t_____ and h____, leaves which d____ or c___, m______

Answer 7

Mechanical adaptations – thorns and hairs, leaves which droop or curl, mimicry

Question 8

What are the three types of plant defence mechanisms? Give one example for each.

Answer 8

1. Physical- cellulose cell walls/tough waxy cuticle/layers of dead cells (bark).
2. Chemical- antibacterial chemicals, poisons
3. Mechanical-